Lathe.



Patented Ian. 2, I900. J. F. DDWDING.

LAfI'H E.

(Application filed Nov. 6, 1899.)

3 Sheets$heet I.

(No Modal.)

hmm mlimnh K I IHIII U N0. 640,28I. Patented Jan. 2, I900. J. F. DOWDING.

LATHE.

(Application filed Nov. 6, 1899.)

(No Model.) 3 SheetsSheet 2 Patented Jan. 2, I900. .1. F. DOWMNG.

Nu. Emma.

L AT H E (Application filed Nov. 6, 1899.)

3 Sheets-Sheet 3,

(No Medal.)

JAMES F. DOWDING, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO HARRY ORME MASCALTJ, OF SAME PLACE.

LATHE.

SPECIFICATION forming part of Letters Patent No. 640,281, dated January 2, 1900.

Application filed November 6, 1899. Serial No. 736,039. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES FRANCIS DOW- DING, a subject of the Queen of Great Britain, residing at Wood Green, London, in the county of Middlesex, England, have invented certain new and useful Improvements in Lathes, of which the following is a full, clear, and exact description, and for which I have made application for British patent, dated the 10th day of March, 1899, in respect of which application no patent has yet been granted.

The invention relates to a multiple-spindle lathe designed to turn, bore, screw, cut, and do all such like work usually done on an ordinary single spindle or mandrel lathe.

The apparatus is shown in the accompanying drawings, in which-- Figure 1 is an elevation of a complete lathe, partly in section. Fig. 2 is an enlarged view of the tool-boxes and means for operating the same. Figs. 3 and at are a plan and section, to a still larger scale, of the former used to operate the tool-boxes. Fig. 5 is a detail view, partlyin section, of a projection or guide used in connection with the former. Fig. 6 is a face view of a plate fitted to the face of the head-stock, carrying tools for such operations as facing, recessing, and parting off and Fig. 7 is an elevation of the same. Fig. 8 is a detail view of part of the plate fitted to the face of the headstock, one chuck, and a cam or wiper carried by said plate for gripping or releasing the work. Fig. 9 is a front view of the cam or wiper and the chuck shown in Fig. 8. Fig. 10 is a section showing more clearly the key-operatin g shaft, keys and keyways in the main shaft, and cone-pulleys.

The chuckspindles a, six of which are shown in the drawings, are arranged in suitable bearings a in the head-stock A, at equal distances from the center of the main shaft Z). Each of these spindles a has a pinion a fitted thereto, which pinions gear into an internally'toothed wheel a, fixed to or forming part of the openbelt cone-pulley (Z, from which they receive their motion. There is also a cross-belt conepulley c for reversing. Said pulleys at and e operate on the main shaft 3) alternately by means of automatic keys cl 0, working in keyways Z) in the shaft 1) and d e in the conepulleys d and e, respectively. These automatic keys (1 6 connect and disconnect first one cone-pulley and then the other with the main shaft h at each end of the stroke of the tool-head. The tool-head consists of a disk or face-plate g, fixed to or fitted so that it may revolve on a hollow mandrel 2', which is free to slide in suitable bearings B in the saddle B of the lathe. Said tool-head is fitted with tool-boxesj, corresponding to the number of chuckspindles a. These tool-boxes j are revolved on studs j in the tool-head by means of pinions 7' on their peripheries gearing into an internally-toothed wheel g, mounted 011 a spigot g in the disk or faceplate g, which may be worked by a handle 9 operating upon a spring-catch g on the internally-toothed wheel g, which catch enters notches g" on the disk or face-plate g.

The disk or face-plate g is fitted with a projection or guide which may be adjusted around its periphery in an undercut groove 1 and fixed at any point thereof by screwing the head g into the nut 9 and thus nipping the overhanging edges of the groove 9 This guide 9 works in the slot is of an adjustable former 71;, consisting of a number of plates of metal held in a frame k by means of setscrews 75 As the tool-head is fed forward the projection or guide is acted upon by the slot 76 of the former 7a, which causes the head to partly revolve on its bearing, by which means any required figure may be produced on the work. The former is seated on the saddle or tail-stock of the lathe, as shown. A worm-wheel is mounted on the rear of the tool-head, and a worm 1' operated byhand and carried by an arm i", gears therewith, by which means the tool-head may be rotated to adjust the depth of the out.

To impart feeding motion to the tool-head, the main shaft 5 is carried through from the head-stock A, running in suitable bearings t" in the tool-head mandrel e. To effect the endwise motion of the tool-head mandrel i, and consequently of the tool-head, the main shaft b is fitted with one or more screwthreaded hubs 1) b with which cooperate drags or nuts 1' t which are capable of being thrown into and out of action by eccentric levers and blocks t t or by other suitable means, as is well understood. The

hollow mandrel 'i has a projection i fitted with adjustable stops '5 which may be adjusted to determine the length of stroke of the mandrel '6, and which by coming into contact with a weighted lever Z or other suitable device at the end of the key-operating ference in diameters may be formed by turning down part of the shaft m or by fitting sleeves m thereon. moved endwise in either direction, the projections or sleeves m raise one of said keys say d-into the keyway d of its cone-pulley and permit the other key e to be moved out from its keyway e in the other cone-pulley, as shown in the drawings. Springs n are used to act upon said keys in the reverse direction to that efiected by the key-operating shaft or plunger m.

On the face of the head-stock A is fitted a plate 0,which contains tools o',carried by suitable tool-holders 0 for such operations as facing, recessing, or parting off. This plate 0 may be operated by means of the hollow shaft having a worm o gearing with a toothed wheel 0 as shown in Figs. 6 and 7. A hand-wheel 0 is attached to the hollow shaft 0 which latter is carried by a rod 0 pivoted at 0 A catch 0 working in a notch 0 in apiece 0 keeps the shaft 0 in gear with the toothed wheel 0 but when it is desired to operate the plate 0 more rapidly the catch 0 is withdrawn from its notch by means of the hand-lever 0 and the worm 0 on the shaft 0 is moved out of gear with the toothed wheel 0 when the plate 0 and tools 0 may be moved by hand.

In some cases the tool-holders 0 may carry cams or wipers p, which come into contact with the studs a on the conical nuts a which by screwing onto and off the split chucks grip or release the work held therein.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a lathe, the combination of a headstock, a hollow main shaft, a keyway therein, an open-belt pulley and a cross-belt pulley mounted on the main shaft, keyways formed in the interior of the pulleys, two keys working in said keyways and having projections, springs to press said keys toward the main shaft, a key-operating shaft arranged in the interior of the main shaft, and projections and recesses on the key-operating shaft to act on the projections of the keys, substantially as set forth.

2. In a lathe, the combination of a headstock, a hollow main shaft, akeyway therein, an open-belt pulley and a cross-belt pulley When the shaft m is mounted on the main shaft, keyways formed in the interior of;the pulleys, two keys workingin said keyways,-projections on said keys, springs to press the keys toward the main shaft, a key-operating shaft arranged in the interior of the main shaft, projections and recesses on the key-operating shaft to act on the projections of the keys, a weighted lever acting to move the key-operating shaft endwise, and adjustable stops mounted on the tool-head mandrel and acting on said lever, substantially as set forth.

3. In a multiple-spindle lathe, the-combination of a head-stock, a hollow main shaft, a keyway therein, an open-belt pulley and a cross-belt pulley mounted on the main shaft, an internally-toothed wheel fixed within one of said belt-pulleys, a plurality of chuck-spindles carried by bearings in the head-stock, toothed pinions fixed to the chuck-spindles, a keyway formed in each of said pulleys, two keys, projections on said keys, springs to press the keys toward the main shaft, a keyoperating shaft arranged in the interior of the main shaft, projections and recesses on the key-operating shaft, a weighted lever acting to move the key-operating shaft endwise, and adjustable stops on the tool-head mandrel acting on said lever, substantially as set forth.

4. In a multiple-spindle lathe, the combination of a head-stock, a hollow main shaft, two pulleys mounted on said shaft, means for keying either pulley to said shaft, with a tool head carried by a hollow mandrel and having a number of tool-boxes mounted on spindles ina disk or face-plate, toothed pinions fixed to said spindles, an internally-toothed wheel carried by the disk or face-plate gearing with said pinions, and a projection or guide adjustably attached to the tool-head working in a fixed former, substantially as set forth.

5. In a multiple-spindle lathe, the combination of a head-stock, a hollow main shaft passing through the machine, open and cross belt pulleys mounted on the main shaft,means for keying either pulley to main shaft, an internally-toothed wheel fixed to the open-belt pulley,a number of pinions fixed to the chuckspindles, a plate pivoted on the face of the head-stock, a number of tool-holders carried by said plate, and means for rotating the plate byaworm and worm-wheel or by hand, substantially as set forth.

6. In a lathe having a number of chuckspindles parallel to the main driving-shaft and receiving motion by means of pinions fixed to said spindles and an internallytoothed gear-wheel mounted on the open-belt pulley, the combination therewith of a plate pivoted to the face of the head-stock having a number of cams or wipers acting against studs on the conical nuts to simultaneously grip and release the work, substantially as set forth.

7. In a multiple-spindle lathe, the combination of a hollow main shaft, keyways in said shaft, belt-pulleys on said shaft having keyways therein, keys having projections, a shaft or plunger located in the interior of said main shaft, a 'tool head carrying a number of tool-boxes, a hollow mandrel carried by bearings in the saddle or tail-stock of the lathe, screw-hubs on main shaft, and drags or nuts capable of being thrown into and out of action for moving the hollow mandrel, a projection on the hollow mandrel having adjustable stops, a weighted lever operated by said stops and acting upon the key-operating shaft or plunger, substantially as set forth.

8. In a multiple-spindle lathe, the combination of a hollowmain shaft, keyways in said shaft, belt-pulleys on said shaft having keyways therein, keys having projections, a key-operating shaft or plunger located in the interior of said main shaft, a plurality of chuck-spindles carried by bearings in the head-stock,toothed pinions fixed to the chuckspindles, an internally-toothed wheel fitted to one of the pulleys and gearing with said toothed pinions, a plate pivoted to the face of the head-stock, a number of tool-holders carried by said plate, a tool-head carrying a number of tool-boxes, a projection or guide adj ustably attached to the tool-head working in a fixed former, a hollow mandrel carried by bearings in the saddle or tail-stock of the lathe by which the tool-head is carried, screwhubs on the main shaft, and drags or nuts capable of being thrown into and out of action for moving the hollow mandrel, a projection on the hollow mandrel having adjustable stops, and a weighted lever operated by stops and acting upon the key-operating shaft or plunger, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

J. F. DOWDING. Vitnesses:

CLAUDE K. MILLs, WM. GIRLING. 

